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A novel demultiplexing photodetector which consists of a filtering cavity and a taper absorption cavity is proposed. The filtering cavity is formed by five coupled (Fabry–Pérot) F–P cavities, which can realize flat-top and steep-edge spectral response. The top mirror of the absorption cavity is designed to be a vertical taper structure, which can increase the times of light reflection. Then the quantum...
We have designed and fabricated a RCE dual-absorption photodetector. In comparison with conventional ones, our design possesses higher quantum efficiency without imparing other optical properties of the device. In addition, its high speed properties can be obtained.
A novel resonant cavity enhanced photodetector with asymmetric dual-absorption layer structures that shifts the limitation on bandwidth-efficiency further than is possible in conventional photodetector is proposed. The quantum efficiency and frequency bandwidth are 93% with a lower reflectivity of top mirror, and 88GHz with mesa area for 10µm×10µm, respectively.
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